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This has been suggested before, however what most people don't realize is that Waze will already detect the abnormal traffic jam in that area & route around it (no matter the cause). *Please note that sometimes it is still faster to go through a jam than around one.

P.S. You posted this in the Map Update Request forum, not the Suggestions for the app forum, so I moved it for you.

I understand the idea but I'm not in for it. In The Netherlands every night certain areas shutdown there traffic lights. Getting reports on that would mean I get redirected around whole blocks, which are essentially faster.

I would like to also voice my support for a way to report non functioning traffic signals. There were numerous traffic lights out on my way to work this morning. Note, that there was NO traffic jam due to many people being off work and schools being closed today. I checked Waze, nobody reported traffic jams or other "hazards" at these intersections. This certainly would have been nice to know considering the snow and somewhat poor road conditions.